sde-download: silenced errors while `find`ing altdir

bin/sde-download

@@ -349,9 +349,10 @@ download_file() {
 		# Alternative Directory
 		#
 		if [ -d "$altdir" ] ; then
-		    altfile=$(find -L "$altdir/" -name `basename $bzfile` | head -n 1)
+			altfile=$(find -L "$altdir/" -name `basename $bzfile` 2> /dev/null |
+				head -n 1)
 		else
-		    altfile=
+			altfile=
 		fi
 
 		if [ -s "$altfile" ] ; then